Dye solution



. application for KARL Lilli TIN, 0F BASEL, SWITZERLAND, ASSIGNOB TO THE SOCIETY '13. R. GEIGY A. (in, GE BASEL, SWITZERLANIQ, A CORPORATION'OF SWITZERL 1v DYE soru'rron.

No Drawing. Original application filed June 26, 1922, Serial No. 571,098, and. in Germany July 29, 1921.

- Divided and this application filed June 8, 1923. Serial No. 844,244.

This is a divisional application of my Letters Patent filed June 26, 1922, Ser. No. 571,098 and'for which the U. S. Letters Patent No. 1,485,790, dated March 4, 1924:, has already been granted.

As well known, the organic dyestuffs of basic or acid nature are utilized for dyeing textile fibres, by dyeing in a neutral or slightly acid solution, with or without mordant, at a relatively high temperature, or by fixing the printed dyes by steaming.

I have found that dyeings can be obtained at ordinary temperatures, which are fast to Washing and rubbing, if dye solutions are employed which contain, with or without a thickening substance about to per cent of glycolic acid. when used in printing, these solutions show the advantage that the steaming can be omitted. The present invention-relates consequently to dye solu-- tions which are characterized by a content of about 10 to 20 per cent of glycolic acid and which are capable of producing dyeings and printings on textile fibres and other substances, such as wood, paper, feathers, leather, furs, straw, hemp, artificial substances, etc.

The process for the manufacture of the said dye solutions may depend on the dyeing quality of the dyestuflz' in as far as basic dyestuffs require an addition of tannin for their employment on cotton. The essential condition for the manufacture of these solutions is that the dyestuifs have been rendered soluble and may remain entirely soluble.

The following examples illustrate the preparation and the composition of the new dye solutions and their use for dyeing and printing purposes. I

Example I 1 gr. of a basic dyestufi is dissolved in 5 gr.'of acetic acid of 40 per cent and 20 gr. of boilino' water; to the solution thus obtained there are added 52 gr. of tragacanth gum thickening and 2 gr. of tannin, 20 gr. of

wards the fabric is well rinsed and soa ed.

The dyestufl is regularly and quickly xed" and cannot be removed by rubbing.

Example [1.

For unions half of silk and half of cotton there is prepared in the same manner as for cotton a dyeing bath having the following composition: 1 gr. of basic dyestuflI' is dissolved in 5 gr. of acetic acid of 40 per cent and 20 gr. of boiling water and there are added afterwards 42 gr. of cold water, 10'

Example III.

For-wool and silk the dye solution is prepared, in a manner similar to that of Example 1 and formed of 1 gr. of acid dyestufi dissolved, in 5 gr. ofacetic acid of 40 per cent and 20 gr. of hot water and there 'are added 44 gr. of cold water, 10 gr. of tragacansh gum thickening and 20 gr. of glycolic aci I The fabric is dyed in pieces in a 'fulling mill and finished without steamin The new dye solutions are uti izable not only inthe industry for dyeing and printing textile fabrics, but can also owing to their stability and their property of-being easily manageable be used for purposes industrial art, as they permit a hitherto unknown fast dyeing of textile fabrics by applying the dye solution b painting orsprinkling. They are utiliza 'le in the same manner for paper, straw, leather, wood, feathers, furs, artificial substances, etc.

What I claim is: v

1. As a new article of manufacture, a new dye solution having a content of about 10 to 20 per cent of glycolic acid and containing at least one dyestufl', which needs no subsequent oxidation after the application of the dye solution to dyeing, printing, paint-- ing or the like purposes.

2. As a new article of manufacture, a new dyeselntien cenrziining E1; thiehening and liming; i nriher n. enntent el zllJOlll) 19 in 20 per eeni; elf glyenlic acid, the said dye selulien containing {Uh least one dyestnfl' which needs no subsequent enidniiien miner the implication elf the dye selntien in dye ing', printing, pninting end the hire purposes.

his ii new nriiele el' innnu'laiclznre, new dye solution containing rennin end having :lnrther n content of nhent l0 re 20 per eenl: eLl' glycolic acid, the seid dye semi-inn cnnrnining at lensl; one dyeslnfi' which needs n0 snhsequent oxidation alter the applianrion of the dye selution he dyeing, printing, painting and lhe like purposes. l. ils a new article 01'? manufacture, a new dye solution containing :1 thickening and tannin. end having further :1 content of about 10 1:0 520 per cent of glycelie acid, the said dye solution containing at least one dyestnil' which needs no subsequent 0xidnlzion nller the application 01 the dye 50111-- lien l0 dyeing, printing, painting and the like purposes.

- lln Witness whereof l have hereunto signed my name this 28th day of May, 1923.

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